User manual 3COM 3COM_SUPERSTACK II ENTRY HUB_24 PORT TP (3C16441)

[. . . ] 1 *Category 5 screened cables must be used to ensure compliance with this standard. 5lb) free standing, or 19" rack or wall mounted using kit supplied Environmental Operating Temperature Humidity 0-50 °C (32-122 °F) 0-90% (non-condensing) DUA1644-0AAA01 1 SAFETY INFORMATION Please read the following safety information carefully before installing the Entry Hub. WARNING: Installation and removal of the unit must be carried out by qualified personnel only. S If installing the unit in a stack with SuperStack II units, it must be installed below the narrower units. [. . . ] The probability of collisions increases during heavy activity on the network. The Auto Partition/Reconnection function partitions a segment from the rest of the network if more than 32 consecutive collisions are detected on that segment. If the Collision LED lights for long periods of time, it indicates a high amount of collisions which can slow your network down. If this happens, you may need to separate parts of your network with a switch. 3 7 Power LED Positioning the Entry Hub The Power LED lights green to indicate the power supply to the unit is correct. If it is not lit, and: None of the ports work There is a problem with the fuse within the power cord’s plug. The Transceiver Module The internal fixed fuse for the power port does not work, but the supply to the Transceiver Module port has twisted pair ports work blown.
CAUTION: When installing the Entry Hub in a stack of different size units, the Entry Hub must be installed below the narrower units. When deciding where to position the Entry Hub ensure: s s It is accessible and cables can be connected easily. Cabling is away from: s Rear Panel Connections 8 Power Supply s s sources of electrical noise such as radios, transmitters and broadband amplifiers. Air flow around the unit and through the vents in the side of the case is not restricted (3Com recommend that you provide a minimum of 25mm (1 inch) clearance). Never stack units more than six high if free standing, and ensure that cables are supported so that they do not cause the stack to fall over. 9 Socket for Redundant Power System s Only connect a 3Com SuperStack II Advanced RPS (Redundant Power System) to this socket. For details, follow the installation instructions in the guide accompanying the Redundant Power System. To prolong the operational life of your units: 10 Transceiver Module Slot A variety of 3Com plug-in Transceiver Modules or the Bridge MicroModule can be installed in the Entry Hub (see “Products and Bulletin Boards”). transceiver Modules provide direct network connections to different media. S s Ensure that SQE test is disabled on the Transceiver Module that you are using. To install a Transceiver Module, refer to the guide that accompanies it. If you subsequently remove the Transceiver Module, you must replace the blanking plate to aid the circulation of cooling air and prevent the entry of dust and debris.
Rack or Wall Mounting The Entry Hub can be mounted in a 19 inch equipment rack, or wall-mounted using the Mounting Kit. CAUTION: Do not remove the Transceiver Module blanking plate while the hub is connected to a power source. Power Up Use the following sequence to power up the Entry Hub: s s Check the network connections and cables. [. . . ] 3Com makes no warranty or representation that its software products will work in combination with any hardware or applications software products provided by third parties, that the operation of the software products will be uninterrupted or error free, or that all defects in the software products will be corrected. For any third party products listed in the 3Com software product documentation or specifications as being compatible, 3Com will make reasonable efforts to provide compatibility, except where the non-compatibility is caused by a "bug" or defect in the third party's product. ELECTRO-MAGNETIC COMPATABILITY FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. [. . . ]